October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Electronic EGR Controller

Using a voltmeter, connect positive lead to the Black/Green wire at the vacuum switching valve wiring connector. Connect negative test lead to Black/Yellow wire.
Check for 12 volts to vacuum switching valve(s) when engine speed is more than 1200 RPM (I-Mark). If not, replace EGR controller.